<template>
  <el-container>
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="@/assets/img/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
         <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false"
      router :default-active="NavState">
      <!-- 一级菜单 -->
      <el-submenu :index="'/'+item.path" v-for="item in menulist" :key="item.id">
        <template slot="title">
          <i :class="iconObj[item.id]"></i>
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
        @click="saveNavState('/'+subItem.path)">
          <i class="el-icon-menu"></i>
          <span>{{subItem.authName}}</span>
        </el-menu-item>
        
      </el-submenu>
     
    </el-menu>
      </el-aside>
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data(){
    return{
      NavState:null,
      isCollapse:false,
      menulist: [],
      iconObj:{
        '125':'iconfont icon-users',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      }
    } 
  },
  created(){
    this.getMenuList()
    this.NavState = window.sessionStorage.getItem('activePath')
    // console.log(this.NavState)
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
      this.$message.success('退出成功')
    },

    async getMenuList(){
      const {data:res} = await this.$http.get('menus')
      // console.log(res)
      if(res.meta.status !==200) return this.$message.error(res.meat.msg)
      this.menulist = res.data
      // console.log(this.menulist)
    },
    // 折叠菜单
    toggleCollapse(){
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activepath){
      // this.NavState = index
      window.sessionStorage.setItem('activePath',activepath)
      this.NavState = activepath
    }
  },
}
</script>
<style lang="less" scoped>
.el-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span{
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
    
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right:10px ;
}

.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>